Partial Lunar Eclipse of 2046 Jul 18

Fred Espenak

Key to Lunar Eclipse Figure (below)

Introduction

The Partial Lunar Eclipse of 2046 Jul 18 is visible from the following geographic regions:

  • Americas, Europe, Africa, western Asia

The diagram to the right depicts the Moon's path with respect to Earth's umbral and penumbral shadows. Below it is a map showing the geographic regions of eclipse visibility. Click on the figure to enlarge it. For an explanation of the features appearing in the figure, see Key to Lunar Eclipse Figures.

The instant of greatest eclipse takes place on 2046 Jul 18 at 01:06:05 TD (01:04:43 UT1). This is 5.4 days before the Moon reaches apogee. During the eclipse, the Moon is in the constellation Sagittarius. The synodic month in which the eclipse takes place has a Brown Lunation Number of 1528.

The eclipse belongs to Saros 120 and is number 59 of 83 eclipses in the series. All eclipses in this series occur at the Moon’s ascending node. The Moon moves southward with respect to the node with each succeeding eclipse in the series and gamma decreases.

The partial lunar eclipse of 2046 Jul 18 is followed two weeks later by a total solar eclipse on 2046 Aug 02.

These eclipses all take place during a single eclipse season.

The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., TD = UT1 + ΔT). ΔT has a value of 82.9 seconds for this eclipse.

The following links provide maps and data for the eclipse.

The tables below contain detailed predictions and additional information on the Partial Lunar Eclipse of 2046 Jul 18 .

Eclipse Data: Partial Lunar Eclipse of 2046 Jul 18

Eclipse Characteristics
Parameter Value
Penumbral Magnitude 1.28236
Umbral Magnitude 0.24776
Gamma-0.86916
Epsilon 0.8086°
Opposition Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 2046 Jul 18 at 01:06:05.5 TD (01:04:42.5 UT1) 2468544.544937
Ecliptic Opposition 2046 Jul 18 at 00:56:16.9 TD (00:54:53.9 UT1) 2468544.538124
Equatorial Opposition 2046 Jul 18 at 00:37:08.3 TD (00:35:45.4 UT1) 2468544.524831
Geocentric Coordinates of Sun and Moon
2046 Jul 18 at 01:06:05.5 TD (01:04:42.5 UT1)
Coordinate Sun Moon
Right Ascension07h50m23.8s19h51m22.3s
Declination+21°00'48.3"-21°47'22.3"
Semi-Diameter 15'44.2" 15'12.7"
Eq. Hor. Parallax 08.7" 0°55'49.5"
Geocentric Libration of Moon
Angle Value
l 4.7°
b 1.0°
c -9.2°
Earth's Shadows
Parameter Value
Penumbral Radius 1.2078°
Umbral Radius 0.6832°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE430
ΔT 82.9 s
Shadow Rule Herald/Sinnott
Shadow Enlargement 1.000
Saros Series 120 (59/83)

Explanation of Lunar Eclipse Data Tables

Eclipse Contacts: Partial Lunar Eclipse of 2046 Jul 18

Lunar Eclipse Contacts
Eclipse Event Contact Time
TD		 Time
UT1		 Zenith Latitude Zenith Longitude Position Angle Axis Distance
Penumbral BeginsP122:36:42.022:35:19.022°08.7'S021°44.0'E 220.2° 1.4608°
Partial BeginsU100:08:30.900:07:08.021°55.7'S000°26.6'W 193.9° 0.9346°
Greatest EclipseGreatest01:06:05.501:04:42.521°47.4'S014°21.1'W 163.7° 0.8086°
Partial EndsU402:03:49.002:02:26.121°39.0'S028°17.8'W 133.6° 0.9350°
Penumbral EndsP403:35:39.303:34:16.421°25.4'S050°29.2'W 107.3° 1.4600°
Eclipse Durations
Eclipse Phase Duration
Penumbral (P4 - P1)04h58m57.4s
Partial (U4 - U1)01h55m18.1s

Explanation of Lunar Eclipse Contacts Table

Polynomial Besselian Elements: Partial Lunar Eclipse of 2046 Jul 18

Polynomial Besselian Elements
2046 Jul 18 at 01:00:00.0 TD (=t0)
n x y d f1 f2 f3
0 0.17872 -0.79014 0.3668 1.20783 0.68325 0.25352
1 0.46897 0.13670 -0.0001 -0.00035 -0.00035 -0.00009
2 -0.00023 0.00010 -0.0000 0.00000 0.00000 0.00000
3 -0.00001 -0.00000 - - - -

At time t1 (decimal hours), each besselian element is evaluated by:

x = x0 + x1*t + x2*t2 + x3*t3 (or x = Σ [xn*tn]; n = 0 to 3)

where: t = t1 - t0 (decimal hours) and t0 = 1.000

Explanation of Besselian Elements

Eclipse Publications

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For more visit: AstroPixels Publishing


Links for the Partial Lunar Eclipse of 2046 Jul 18

Links to Additional Lunar Eclipse Information

• Decade Tables of Lunar Eclipses:
| 1901 - 1910 | 1911 - 1919 | 1921 - 1930 | 1931 - 1940 | 1941 - 1950 |
| 1951 - 1960 | 1961 - 1970 | 1971 - 1980 | 1981 - 1990 | 1991 - 2000 |
| 2001 - 2010 | 2011 - 2020 | 2021 - 2030 | 2031 - 2040 | 2041 - 2050 |
| 2051 - 2060 | 2061 - 2070 | 2071 - 2080 | 2081 - 2090 | 2091 - 2100 |

Lunar Eclipse Publications

Eclipse Predictions

Predictions for the Partial Lunar Eclipse of 2046 Jul 18 were generated using the JPL DE430 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass.

The elliptical shape of Earth's umbral and penumbral shadows were calculated using the Herald/Sinnott method of modeling Earth's shadows to compensate for the opacity of the terrestrial atmosphere (including the oblateness of Earth).

The predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 82.9 seconds for this eclipse.

Acknowledgments

Some of the content on this web site is based on the book 21st Century Canon of Lunar Eclipses. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce eclipse data when accompanied by a link to this page and an acknowledgment:

"Eclipse Predictions by Fred Espenak, www.EclipseWise.com"

The use of diagrams and maps is permitted provided that they are NOT altered (except for re-sizing) and the embedded credit line is NOT removed or covered.